Discover the basics of calorie inputs and outputs and learn strategies designed to help you lose body fat or gain muscle in the most efficient and effective ways. Jonny and Laura talk through why calories matter, how food intake and energy output interact to determine weight gain or loss, and systems for making long term changes to your body composition. This is an introduction to a series of episodes discussing the ins and outs of fat loss and muscle gain. Put your earphones in and get ready to make changes!